getDispatchableOperation

Returns all the dispatchable operations matching the operation QName. A dispatchable
operation is one that is NOT a JAX-WS client-side async method invocation and does NOT
carry an @WebMethod(exclude=true) annotation.
JAX-WS client-side async methods which have signatures of the following forms are
filtered out of this list: javax.xml.ws.Response
method(...) java.util.concurrent.Future> method(..., javax.xml.ws.AsyncHandler)

These methods are filtered because a common use case is to use the same SEI on both the
client and service implementation side, generating both the client and service implemntation
code from that SEI. If that SEI happens to contain the client-side-only JAX-WS methods, they
should be ingored on the service implemenation side. To return all the operations, use
getOperation(QName).

getOperation

Return an OperationDescription for the corresponding SEI method. Note that this ONLY works
if the OperationDescriptions were created from introspecting an SEI. If the were created
with a WSDL then use the getOperation(QName) method, which can return > 1 operation.